CN108679261B

CN108679261B - Manual switching valve

Info

Publication number: CN108679261B
Application number: CN201810836459.3A
Authority: CN
Inventors: 刘振; 胡淼; 陈旭; 张颖佳
Original assignee: QINGDAO SIRUI TECHNOLOGY Co Ltd; CRRC Qingdao Sifang Rolling Stock Research Institute Co Ltd
Current assignee: CRRC Qingdao Sifang Rolling Stock Research Institute Co Ltd; CRRC Brake System Co Ltd
Priority date: 2018-07-26
Filing date: 2018-07-26
Publication date: 2019-12-27
Anticipated expiration: 2038-07-26
Also published as: CN108679261A

Abstract

The invention provides a manual switching valve which comprises a valve body and a valve core, wherein an air channel is formed in the valve body, the valve core is arranged in the valve body, a through hole communicated with the air channel is formed in the valve core, an opening and closing assembly capable of controlling the opening and closing of the through hole is arranged in the through hole, the opening and closing assembly can move along the opening direction of the through hole, a rotary disc capable of rotating relative to the valve core is arranged on one side, away from the air channel, of the valve core, one end of the opening and closing assembly extends out of the through hole and abuts against the rotary disc, and the surfaces, in contact with the opening and closing assembly, of the rotary disc have different heights, so that the opening and closing assembly can move relative to the through. The manual switching valve provided by the invention has the advantages of simple structure, easiness in realization, realization of multi-gas-path control, wide application range and high safety level.

Description

Manual switching valve

Technical Field

The invention belongs to the technical field of rail locomotive vehicles, and particularly relates to a manual switching valve.

Background

Electric locomotives (including electric automobiles, electric trains and motor train units driven by air bag type pantographs) are used as a main transportation tool and play a great role in production and life of people. The pantograph is used for transmitting the electric energy of a contact network to high-voltage equipment in a vehicle, and is important electrical equipment influencing the operation of an electric locomotive.

The pantograph mainly depends on compressed air to finish pantograph lifting action, and the pantograph lifting control device comprises a main air supply unit, an auxiliary air supply unit, a pantograph lifting control module and related cab equipment. The pantograph control valve is located in the cab and at the front end of the gas circuit of the pantograph, is used for manually relieving pantograph lifting pressure in emergency (for example, the live contact cock of the pantograph lifting gas circuit controlled in the cab is out of work), completes the separation of the pantograph from a contact network, is the last line of defense controlled by the pantograph, and requires extremely high safety level.

The existing manual switching valve mostly uses the forms of ball valve or piston valve, etc., the opening and closing piece (sphere) of the ball valve is driven by the valve stem, and rotates around the axis of the ball valve to realize the on-off of the gas circuit; the upper end valve rod of the opening and closing piece (piston) of the piston valve is connected to a hand wheel or a wrench, and the lower end of the opening and closing piece (piston) is correspondingly matched with the annular valve seat. The ball valve and the piston valve are complex in structure, and the quantity of the switching valve positions and the control gas circuits is limited, so that the ball valve and the piston valve cannot be directly used for pantograph control.

Disclosure of Invention

The invention provides a manual switching valve aiming at the technical problem.

In order to achieve the purpose, the invention adopts the technical scheme that:

the utility model provides a manual switching valve, including inside the valve body of seting up the gas circuit and set up in case in the valve body, the case seted up with the through-hole of gas circuit intercommunication, be provided with steerable in the through-hole the subassembly of opening and close that the through-hole opened and close, wherein:

the opening and closing assembly can move along the opening direction of the through hole, a rotary disc which can rotate relative to the valve core is arranged on one side, away from the air path, of the valve core, one end of the opening and closing assembly extends out of the through hole and abuts against the rotary disc, and the surfaces, in contact with the opening and closing assembly, of the rotary disc have different heights, so that the opening and closing assembly can move relative to the through hole under the rotation of the rotary disc, and the opening and closing of the through hole are achieved.

Preferably, the through hole includes a first hole communicated with the air passage and a second hole close to the rotary table, the first hole is communicated with the second hole, the size of the first hole is larger than that of the second hole to form a step surface, the opening and closing assembly has a clamping portion, and the size of the clamping portion is larger than that of the second hole and smaller than that of the first hole, so that the clamping portion is clamped on the step surface and blocks the passage of the first hole and the second hole.

Preferably, the opening and closing assembly further comprises a guide portion arranged on one side of the clamping portion, the guide portion is inserted into the second hole, and one end of the guide portion extends out of the second hole and abuts against the rotary disc.

Preferably, the guiding part comprises a guiding rod arranged on one side of the clamping part and a rolling ball arranged at one end of the guiding rod, the rolling ball and the guiding rod do not generate relative displacement in the axial direction, and the rolling ball is in contact with the turntable so as to facilitate the rotation of the turntable.

Preferably, the valve core is provided with a plurality of through holes at intervals, and the opening and closing assembly is arranged in the through holes.

Preferably, the valve element is provided with an exhaust hole and an air outlet at intervals, the exhaust hole and the air outlet are blind holes and have openings facing the valve body, the valve element is provided with four through holes at intervals, the four through holes are respectively a first through hole, a second through hole, a third through hole and a fourth through hole, the opening and closing assembly is arranged in each through hole, a plurality of valve element inner air paths for communicating the through holes or the exhaust hole or the air outlet are arranged in the valve element, the first through hole is adjacent to the air outlet and is communicated with the air path in the valve element, the second through hole 212, the third through hole and the fourth through hole are adjacent to the air outlet and are communicated with the air path in the valve element, and the second through hole is adjacent to the exhaust hole and is communicated with the air path in the valve element.

Preferably, the valve body is internally provided with the air path corresponding to the through hole, the exhaust hole and the air outlet, one end of the air path is communicated with the through hole or the exhaust hole or the air outlet, and the other end of the air path is communicated with the outside.

Preferably, a rotating shaft is fixedly arranged at the center of the rotating disc, the rotating shaft penetrates through the valve core and the valve body and extends out of the valve body to form an extending end, and the extending end is provided with a handle capable of driving the rotating shaft to rotate.

Preferably, the handle has been seted up and has been locked the groove, on the valve body with the handle is adjacent to be provided with spacing lock, spacing lock includes the locking piece and is used for control the lock core of locking piece position, the locking piece with locking groove size cooperation and can block locate locking inslot is in order to restrict the handle rotates.

Preferably, a microswitch is arranged on one side of the limit lock, the microswitch comprises a reed, the limit lock further comprises a transmission piece which can move under the driving of the lock cylinder and trigger the reed, and the transmission piece is arranged adjacent to the reed.

Compared with the prior art, the invention has the advantages and positive effects that:

1. according to the manual switching valve provided by the invention, through the matching of the uneven turntable and the opening and closing assembly, the on-off control of the air passage is realized, and further the switching of the valve position is realized, and the manual switching valve is simple in structure and easy to realize.

2. The manual switching valve provided by the invention can arrange the positions and the number of the through holes and the opening and closing assemblies and the trend of the internal gas path according to the requirements of practical application, and meanwhile, the manual switching valve is matched with the height design of the contact surface of the rotary table and the opening and closing assemblies, so that the control of multiple gas paths is realized, and the application range is wide.

3. The manual switching valve provided by the invention specifically designs the arrangement of the internal through hole, the opening and closing assembly and the trend of the gas circuit, so that the manual switching valve has two valve positions, namely a conducting position and a cut-off position, meets the control requirement of a pantograph and can be directly used as a control valve of the pantograph of a train.

4. According to the manual switching valve provided by the invention, the limiting lock is arranged, so that the manual switching valve has a valve position locking function, and the safety of the manual switching valve is improved; through further setting up supplementary spacing lock, further improve manual diverter valve's security level.

5. The manual switching valve provided by the invention is safe and reliable by arranging the microswitch at one side of the limit lock to output a pantograph state signal.

Drawings

Fig. 1 is a schematic structural diagram of a manual switching valve according to an embodiment of the present invention;

FIG. 2 is a view of the manual switch valve shown in FIG. 1 in a different orientation;

FIG. 3 is a schematic structural diagram of a valve body according to an embodiment of the present invention;

FIG. 4 is a cross-sectional view of a valve body provided in accordance with an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a valve cartridge provided in an embodiment of the present invention;

FIG. 6 is a different directional view of the valve cartridge shown in FIG. 5;

FIG. 7 is a cross-sectional view taken along A-A in FIG. 2 (b);

FIG. 8 is a partially enlarged view of the opening and closing assembly shown in FIG. 7;

fig. 9 is a schematic structural view of an opening and closing assembly according to an embodiment of the present invention;

fig. 10 is a schematic view of an internal air passage of the manual switching valve according to the embodiment of the present invention;

fig. 11 is a schematic structural diagram of a turntable according to an embodiment of the present invention;

fig. 12 is a schematic structural diagram of a manual switching valve having a valve position locking function according to an embodiment of the present invention;

FIG. 13 is a view of the manual switch valve of FIG. 12 in a different orientation;

fig. 14 is a schematic structural diagram of a manual switching valve with an additional auxiliary limit lock according to an embodiment of the present invention;

fig. 15 is a schematic structural diagram of a manual switching valve provided with a microswitch according to an embodiment of the present invention.

In the above figures: 1. a valve body; 11. a gas circuit; 12. a cavity; 2. a valve core; 201. positioning pins; 21. A through hole; 2101. a first hole; 2102. a second hole; 211. a first through hole; 212. a second through hole; 213. A third through hole; 214. a fourth via hole; 22. an exhaust hole; 23. an air outlet; 3. an opening and closing assembly; 31. A clamping part; 311. a groove; 32. a guide portion; 321. a guide bar; 322. rolling a ball; 33. positioning a rod; 34. a gasket; 4. a turntable; 41. a rotating shaft; 42. a handle; 43. a high-order plane; 44. a low-order plane; 5. a positioning sleeve; 51. positioning holes; 6. a cover body; 61. a top pillar; 7. a limiting lock; 701. a locking member; 702. a lock cylinder; 703. a transmission member; 71. a conducting position limiting lock; 72. a cutting position limit lock; 73. an auxiliary limit lock; 8. a microswitch; 801. a reed.

Detailed Description

The invention is described in detail below by way of exemplary embodiments. It should be understood, however, that elements, structures and features of one embodiment may be beneficially incorporated in other embodiments without further recitation.

In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", "front", "rear", and the like indicate orientations or positional relationships based on positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

An embodiment of the present invention provides a manual switching valve, where fig. 1 is a perspective view of the manual switching valve, fig. 2 is a view of fig. 1 in different directions, where fig. 2(a) is a front view, fig. 2(b) is a top view, fig. 2(c) is a left view, and fig. 2(d) is a right view. The manual switching valve comprises a valve body 1 and a valve core 2 (shown in fig. 5) arranged in the valve body 1, as shown in fig. 3 and 4, an air passage 11 and a cavity 12 for accommodating the valve core 2 are arranged in the valve body 1, fig. 7 is a sectional view along the direction a-a of fig. 2(b), as shown in fig. 7, a through hole 21 communicated with the air passage 11 is arranged on the valve core 2, an opening and closing component 3 capable of controlling the opening and closing of the through hole 21 is arranged in the through hole 21, the opening and closing component 3 can move along the opening direction of the through hole 21, a turntable 4 capable of rotating relative to the valve core 2 is arranged on one side of the valve core 2 far away from the air passage 11, one end of the opening and closing component 3 extends out of the through hole 21 and abuts against the turntable 4, and the surfaces of the turntable 4, which are in contact with the opening, so that the opening and closing assembly 3 can move relative to the through hole 21 under the rotation of the rotating disc 4 to open and close the through hole 21.

According to the manual switching valve provided by the embodiment of the invention, the uneven turntable 4 is arranged to be matched with the opening and closing assembly 3 in the through hole 21, so that the opening and closing of the through hole 21 passage in the valve core 2 are controlled, the switching of different valve positions is realized, the structure is simple, and the realization is easy; the number of the through holes 21 and the opening and closing assemblies 3 arranged in the valve core 2 is not limited, the positions, the number and the gas path directions of the internal through holes 21 and the opening and closing assemblies 3 can be arranged according to the practical application occasions of the manual switching valve, and meanwhile, the control of opening and closing of multiple gas paths is realized by matching with the height design of the contact surface of the rotary disc 4 and the opening and closing assemblies 3, the structure is simple, and the application is wide. The contact surface of the turntable 4 and the opening and closing component 3 can be set into various forms according to requirements, such as uneven surfaces or a plurality of planes with different heights, and also can be in other forms, as long as the turntable 4 can rotate to different positions, so that the opening and closing component 3 is different in position, and the valve position can be switched.

In a preferred embodiment, as shown in fig. 7 and 11, a rotating shaft 41 is fixedly disposed at the center of the rotating disc 4, the rotating shaft 41 penetrates through the valve core 2 and the valve body 1 and extends out of the valve body 1 to form an extended end, and the extended end is provided with a handle 42 capable of driving the rotating shaft 4 to rotate. The handle 42 is provided to facilitate the manual control of the rotation of the rotary disk 4 by an operator, and to facilitate the switching of different valve positions.

In a preferred embodiment, as shown in fig. 5, a positioning pin 201 is disposed on a surface of the valve element 2 contacting the valve body 1, and a hole into which the positioning pin 201 is inserted is formed in a position of the valve body 1 corresponding to the positioning pin 201, so as to further ensure that the valve element 2 and the valve body 1 are circumferentially fixed.

In a preferred embodiment, as shown in fig. 7, the through hole 21 includes a first hole 2101 communicated with the air path 11 and a second hole 2102 near the rotating disc 4, the first hole 2101 is communicated with the second hole 2102, the size of the first hole 2101 is larger than that of the second hole 2102 to form a step surface, fig. 8 is a partially enlarged view of the opening and closing assembly in fig. 7, the opening and closing assembly 3 has a latching portion 31, and the size of the latching portion 31 is larger than that of the second hole 2102 and smaller than that of the first hole 2101, so that the latching portion 31 is latched on the step surface and blocks the passage between the first hole 2101 and the second hole 2102. In this embodiment, as an implementation manner of blocking the air path of the first hole 2101 and the second hole 2102, a person skilled in the art may further set other structures as needed.

Fig. 9 is a schematic structural view of the opening and closing assembly 3, in which fig. 9(a) is a perspective view and fig. 9(b) is a front view. The clamping portion 31 is provided with a groove 311 for passing air, and the distance from the bottom of the groove 311 to the central axis of the through hole 21 is greater than the size of the second hole 2102, so that the clamping portion 31 can block the passage between the first hole 2101 and the second hole 2102. In this embodiment, by providing the groove 311, even if the outer circumference of the locking portion is equal to the size of the second hole 2102, the air passages in the through hole 21 can be communicated after the locking portion 31 is opened.

In a preferred embodiment, as shown in fig. 8 and 9, the opening and closing assembly 3 further includes a guide portion 32 disposed on one side of the fastening portion 31, the guide portion 32 is inserted into the second hole 2102, and one end of the guide portion 32 extends out of the second hole 2102 and abuts against the rotating disc 4.

As shown in fig. 8 and 9, the guide portion 32 preferably includes a guide rod 321 disposed on one side of the engaging portion 31 and a ball 322 disposed at one end of the guide rod 321, the ball 322 and the guide rod 321 do not generate relative displacement in the axial direction, and the ball 322 contacts the turntable 4 to facilitate the rotation of the turntable 4. In the present embodiment, by providing the rolling ball 322, the friction force between the guide portion 32 and the turntable 4 is reduced, and the rotation of the turntable 4 is facilitated.

Further, as shown in fig. 8 and 9, a positioning sleeve 5 is fixedly disposed at an opening of the first hole 2101, a positioning rod 33 capable of moving axially relative to the positioning sleeve 5 is disposed on one side of the engaging portion 31, a positioning hole 51 for the positioning rod 33 to pass through is disposed on the positioning sleeve 5, and the positioning hole 51 is matched with the positioning rod 33 in size to prevent the opening and closing assembly 3 from moving axially.

Preferably, a spring is arranged outside the positioning rod 33, one end of the spring abuts against the positioning sleeve 5, and the other end of the spring abuts against the clamping portion 31, so as to buffer the movement of the opening and closing assembly 3 and enable the opening and closing assembly to rapidly return to the original position under the condition of no force action.

Under some circumstances, if external pressure is too big, lead to the atmospheric pressure in second hole 2102 to be greater than the atmospheric pressure in first hole 2101, under this condition, even open and close subassembly 3 and not jack-up by carousel 4, card establishes portion 31 and still can be jack-up under the effect of atmospheric pressure to gas circuit intercommunication between first hole 2101 and the second hole 2102, through gaseous diffusion, atmospheric pressure is even gradually, reaches the equilibrium, makes open and close subassembly 3 can the automatic recovery normal position, realizes automatically regulated. If the automatic adjustment function is obstructed, the air pressure is gradually accumulated, and the air pressure cannot be balanced, so that potential safety hazards are caused. In order to realize the automatic adjusting function of the opening and closing assembly 3 under the specific pressure condition, the stiffness (K value) of the spring or the diameter of the guide rod 321 can be set.

Preferably, as shown in fig. 8 and 9, in order to avoid abrasion of the engaging portion 31 during use, a gasket 34 is disposed between the engaging portion 31 and the guide portion 32, so as to avoid direct contact friction between the engaging portion 31 and the step surface and avoid abrasion failure of the opening and closing assembly 3. The gasket 34 is preferably a rubber gasket; the washer 34 is sized larger than the second aperture 2102 to provide a barrier to passage of the first aperture 2101 and the second aperture 2102.

As mentioned above, in a preferred embodiment, as shown in fig. 5 and 6, a plurality of through holes 21 are provided on the valve core 2 at intervals as required, and the opening and closing assembly 3 is provided in the plurality of through holes 21.

The invention provides a manual switching valve which can be used as a pantograph control valve of a railway vehicle. Fig. 6(a) is a plan view of the valve body 2 shown in fig. 5, fig. 6(B) is a front view of the valve body 2 shown in fig. 5, and fig. 6(c) is a sectional view of fig. 6(B) taken along the direction B-B. As shown in fig. 6, the valve core 2 is provided with an exhaust hole 22 and an air outlet hole 23 at intervals, the exhaust hole 22 and the air outlet hole 23 are both blind holes and open towards the valve body 1, the valve core 2 is provided with four through holes 21 at intervals, which are a first through hole 211, a second through hole 212, a third through hole 213 and a fourth through hole 214, the opening and closing assembly 3 is arranged in each through hole 21, and a plurality of valve core internal air paths for communicating the through holes 21, the exhaust hole 22 or the air outlet hole 23 are arranged in the valve core 2; fig. 6(c) shows the air path inside the valve core 2, wherein the first through hole 211 is arranged adjacent to the air outlet hole 23 and is communicated with the air path inside the valve core to form a first air path; the second through hole 212, the third through hole 213 and the fourth through hole 214 are adjacently disposed and communicate through the valve element internal air passage, and the second through hole 212 is adjacently disposed to the exhaust hole 22 and communicates through the valve element internal air passage, forming a second air passage.

In the above embodiment, the first air passage and the second air passage in the valve element 2 are formed by designing according to the requirements of different states of the pantograph when the pantograph is switched on and off. When the rotating disc 4 is rotated, the on-off state of the first air circuit and the second air circuit is controlled, and the switching of different states of the pantograph is realized.

Furthermore, the valve body 1 is internally provided with the air path corresponding to the through hole 21, the exhaust hole 22 and the air outlet 23, one end of the air path is communicated with the through hole 21 or the exhaust hole 22 or the air outlet 23, and the other end of the air path is communicated with the outside. In order to more clearly show the air passages inside the manual switching valve, fig. 10 shows the communication of the air passages inside the manual switching valve, but it should be noted that fig. 10 is not an actual cross-sectional view of the arrangement form shown in fig. 6, and the first through hole 211 to the fourth through hole 214 cannot be simultaneously shown in an actual cross-section, but it can be understood that a person skilled in the art may also adopt other position arrangement manners different from fig. 6 as long as the same communication condition of the air passages is achieved, and therefore, an actual cross-sectional view of the situation shown in fig. 10 may also appear. As shown in fig. 10, a port of an air path in the valve body 1, which is communicated with the first through hole 211, is a pantograph pressure inlet a, a port of an air path, which is communicated with the air outlet 23, is a pantograph pressure outlet B, the end B is connected to the pantograph air bag, and the air path formed between the ports a and B controls the inflation of the pantograph air bag, so as to realize pantograph lifting. The ports of the air paths communicated with the second through hole 212, the third through hole 213 and the fourth through hole 214 in the valve body 1 are C, D, E respectively, the port C, D, E is externally connected to the pantograph airbag, the port of the air path communicated with the exhaust hole 22 in the valve body 1 is F, and the air path formed between the ports C, D, E and F controls the exhaust of the pantograph airbag so as to realize pantograph lowering.

Preferably, as shown in fig. 11, the turntable 4 includes a high-order flat surface 43 and a low-order flat surface 44, the distance from the high-order flat surface 43 to the step surface is smaller than the axial length of the guide portion 32, and the distance from the low-order flat surface 44 to the step surface is greater than or equal to the axial length of the guide portion 32. It is understood that the fan angles, the numbers, etc. of the high order planes 43 and the low order planes 44 can be adjusted according to the requirements of the practical application.

The working principle of the manual switching valve as the pantograph control valve is as follows:

as shown in fig. 10, when the high-order plane 43 of the turntable 4 rotates to a position below the first through hole 211, the opening and closing assembly 3 in the first through hole 211 is jacked up by the high-order plane 43, so that the clamping portion 31 moves upward, the air path of the first through hole 211 is communicated, the air path between the port a and the port B is communicated, and the pantograph airbag is inflated to realize pantograph lifting; at this time, the second through hole 212, the third through hole 213, and the fourth through hole 214 are all located on the low-order plane 44 of the turntable 4, the engaging portion 31 is engaged with the step surface, the through hole air passage is closed, the pantograph air bag cannot exhaust air, and the pantograph is kept in the pantograph-raised state. At this time, the pantograph control valve is in the on position.

When the high-order plane 43 of the turntable 4 rotates to the lower side of the second through hole 212, the third through hole 213 and the fourth through hole 214, the opening and closing assemblies 3 in the second through hole 212, the third through hole 213 and the fourth through hole 214 are all jacked up by the high-order plane 43, so that the air passages in the second through hole 212, the third through hole 213 and the fourth through hole 214 are communicated and communicated with the port F, and therefore, the air in the pantograph airbag is discharged through the communicated air passages and the exhaust holes, and pantograph lowering of the pantograph is realized. At this time, the first through hole 211 is located in the low-order plane 44 of the turntable 4, the air passage of the first through hole 211 is closed, and the pantograph air bag is not inflated. At this time, the pantograph control valve is in the shut-off position.

As a preferred embodiment, as shown in fig. 7, a cover 6 for assembling the valve body 1, the valve core 2 and the rotary disk 4 is disposed on a side of the rotary disk 4 away from the valve core 2, and a top pillar 61 having a circular arc surface is disposed between the cover 6 and the rotary disk 4, and the circular arc surface contacts with the rotary disk 4 to facilitate the rotation of the rotary disk 4.

In order to improve the safety of the manual switching valve, especially when the manual switching valve is applied to pantograph control, the embodiment of the invention further provides the manual switching valve with the valve position locking function. Fig. 12 is a perspective view of the manual switching valve, and fig. 13 is a view of fig. 12 in a different direction, in which fig. 13(a) is a front view, fig. 13(b) is a plan view, fig. 13(c) is a left view, and fig. 13(d) is a right view. As shown in fig. 12 and 13, the handle 42 is provided with a locking groove 421, the valve body 1 is provided with a limiting lock 7 adjacent to the handle 42, the limiting lock 7 comprises a locking piece 701 and a lock cylinder 702 for controlling the locking piece 701 to extend and retract, and the locking piece 701 is matched with the locking groove 421 in size and can be clamped in the locking groove 421 to limit the rotation of the handle 42.

In the above embodiment, by providing the limit lock 7, the rotation position of the handle 42 can be locked, and further the rotation of the turntable 4 can be locked, thereby avoiding the influence on the state of the pantograph due to the switching of the valve position of the manual switching valve caused by error or carelessness, and further possibly influencing the driving safety.

As a preferred embodiment, further referring to fig. 13, the manual switching valve includes 2 limiting locks 7, namely a conducting position limiting lock 71 and a blocking position limiting lock 72, when the handle 42 is locked to the position of the conducting position limiting lock 71, the gas path of the first through hole 211 is opened, the first gas path is conducted, the gas path between the pantograph pressure inlet a and the pantograph pressure outlet B is conducted, the gas paths of the second through hole 212, the third through hole 213 and the fourth through hole 214 are closed, the second gas path is closed, and the pantograph control valve is in the conducting position; when the handle 42 is locked to the position of the cut-off position limiting lock 72, the first through hole 211 is closed, the first air passage is closed, the air passages of the second through hole 212, the third through hole 213 and the fourth through hole 214 are communicated, the second air passage is communicated, and the pantograph control valve is located at the cut-off position.

In order to further improve the safety of the manual switching valve, an auxiliary limit lock 73 is connected in series to one side of the limit lock 7, and the auxiliary limit lock 73 is used for controlling the opening of the limit lock 7, thereby further improving the safety level of the pantograph control valve.

As shown in fig. 14, an auxiliary limit lock 73 is connected in series to one side of the cut-off position limit lock 72, the auxiliary limit lock 73 is used to control the opening of the cut-off position limit lock 72, and if the valve position of the manual switching valve needs to be switched, the auxiliary limit lock 73 needs to be opened first, and then the cut-off position limit lock 72 is opened, so that the handle can be rotated and switched to the conducting position. Fig. 14 only provides an embodiment, and it is also possible to select to connect the auxiliary limit lock 73 in series on one side of the conducting position limit lock 71 to control the opening of the conducting position limit lock 71 or connect both the conducting position limit lock 71 and the intercepting position limit lock 72 in series with the auxiliary limit lock 73 as required, so as to achieve the improvement of the security level.

As a preferred embodiment, as shown in fig. 12, a micro switch 8 is disposed on one side of the limit lock 7, for a clearer illustration, a mounting plate for mounting the micro switch 8 and the limit lock 7 in fig. 12 is deleted, and as shown in fig. 15 after deletion, the micro switch 8 includes a spring plate 81, the limit lock 7 further includes a transmission member 703 that can move linearly under the driving of the rotation of the lock cylinder 702 and trigger the spring plate 81, and the transmission member 703 is disposed adjacent to the spring plate 81.

The microswitch 8 is conventional in the art and will not be described in detail herein. The lock core 702 and the transmission member 703 may be matched by a structure commonly used in the mechanical field to convert rotation into linear motion, such as a screw rod or a cam mechanism.

The microswitch 8 can be arranged on one side of the conducting position limiting lock 71 to output a conducting position signal or on one side of the intercepting position limiting lock 73 to output an intercepting position signal according to requirements, and the pantograph state signal is transmitted to the cab, so that redundancy of output signals is realized.

The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention in other forms, and any person skilled in the art may apply the above modifications or changes to the equivalent embodiments with equivalent changes, without departing from the technical spirit of the present invention, and any simple modification, equivalent change and change made to the above embodiments according to the technical spirit of the present invention still belong to the protection scope of the technical spirit of the present invention.

Claims

1. The utility model provides a manual diverter valve for rail vehicle pantograph control, including inside the valve body of seting up the gas circuit and set up in case in the valve body, the case seted up with the through-hole of gas circuit intercommunication, be provided with steerable in the through-hole the subassembly of opening and close that the through-hole opened and close, its characterized in that:

the opening and closing assembly can move along the opening direction of the through hole, a rotary disc which can rotate relative to the valve core is arranged on one side, away from the air path, of the valve core, one end of the opening and closing assembly extends out of the through hole and abuts against the rotary disc, and the surfaces, in contact with the opening and closing assembly, of the rotary disc have different heights, so that the opening and closing assembly can move relative to the through hole under the rotation of the rotary disc to realize the opening and closing of the through hole;

the valve core is provided with an exhaust hole and an air outlet at intervals, the exhaust hole and the air outlet are blind holes, the openings of the exhaust hole and the air outlet face the valve body, the valve core is provided with four through holes at intervals, the four through holes are respectively a first through hole, a second through hole, a third through hole and a fourth through hole, the opening and closing assembly is arranged in each through hole, and a plurality of in-valve air channels are arranged in the valve core; the first through hole is adjacent to the air outlet hole and is communicated with the air passage in the valve core; the second through hole, the third through hole and the fourth through hole are adjacently arranged and communicated through the valve core inner air passage, and the second through hole is adjacently arranged with the exhaust hole and communicated through the valve core inner air passage;

the valve body is internally provided with the air passage corresponding to the through hole, the exhaust hole and the air outlet respectively, one end of the air passage is communicated with the through hole or the exhaust hole or the air outlet, and the other end of the air passage is communicated with the outside;

a port in the valve body, which is communicated with the first through hole, is a pantograph pressure inlet, and a port in the valve body, which is communicated with the air outlet hole, is a pantograph pressure outlet, so that pantograph lifting is realized; and the air passages in the valve body, which are respectively communicated with the second through hole, the third through hole, the fourth through hole and the exhaust hole, control the exhaust of the pantograph air bag so as to realize the pantograph lowering of the pantograph.

2. The manual switching valve according to claim 1, wherein: the through-hole include with the first hole of gas circuit intercommunication and be close to the second hole of carousel, the first hole with the second hole intercommunication, the size in first hole is greater than the size in second hole is in order to form the step face, it establishes the portion to open and close the subassembly has a card, the size of establishing the portion of card is greater than the size in second hole and be less than the size in first hole, so that the card is established the portion card and is located on the step face and block the first hole with the route in second hole.

3. The manual switching valve according to claim 2, wherein: the opening and closing assembly further comprises a guide portion arranged on one side of the clamping portion, the guide portion is inserted into the second hole, and one end of the guide portion extends out of the second hole and abuts against the rotary disc.

4. The manual switching valve according to claim 3, wherein: the guide part including set up in the guide bar of card portion one side and set up in the spin of guide bar one end, the spin with the axial of guide bar does not produce relative displacement, the spin with the carousel contact so that the carousel rotates.

5. The manual switching valve according to claim 1, wherein: the rotary table is characterized in that a rotary shaft is fixedly arranged at the center of the rotary table, the rotary shaft penetrates through the valve core and the valve body and extends out of the valve body to form an extending end, and a handle capable of driving the rotary shaft to rotate is arranged at the extending end.

6. The manual switching valve according to claim 5, wherein: the handle has been seted up and has been locked the groove, on the valve body with the handle is adjacent to be provided with spacing lock, spacing lock includes the locking piece and is used for control the lock core of locking piece position, the locking piece with locking groove size cooperation and can block to locate locking inslot is in order to restrict the handle rotates.

7. The manual switching valve according to claim 6, wherein: the limiting lock is characterized in that a microswitch is arranged on one side of the limiting lock, the microswitch comprises a reed, the limiting lock further comprises a transmission piece which can move under the driving of the lock cylinder and trigger the reed, and the transmission piece is arranged adjacent to the reed.